US100157A - Improved pitman- - Google Patents

Description

TBD STATES sALBM T. LAMB7 or NBw ALBANY, INDIANA.

IMPROVED Pl-TIVIAN-.GONNECTION Specification formingpart of Letter'sPatcntNo. 100,157, dated February 22, 187.

To all whom it 'may concern:

Be it known that I, SALEM T. LAMB, of New Albany, in the county of Floyd and State of Indiana, have invented a new and useful 11nprovement in Pitmen-Connections; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, in which- Figure l is a side elevation of my invention attached to the heel of a harvester-cutter. Fig'. 2 is a plan of the end of the pitman. Fig'. 3 is a bottom plan of the nut for the same.

Fig. et is a longitudinal section of same joint.

Fig. 5 is a plan showing joint complete. Figs. 6 and 7 show inner surface of the parts of same joint; Fig. 8, outer surface of loose cap with its bolt; Fig. 9, wrist-pin detached from crankwheel; Fig. l0, vertical longitudinal section through crank joint; Fig. ll, plan of same joint; Figs. l2 and 13, inner surfaces of parts of same joint; Figs. 14 and l5, outer surfaces of same parts; Fig. 16, clamp-bolt belonging' to said joint.

This invention relates to that class of connecting-joints which are flexible in lateral directions, so that the operation of the joint shall not be impaired by slight changes in the relative lines of motion of cutters and pitman and it specially consists in the manner of constructing and attaching the various parts of a ball-and-socket joint.

That others may understand the construction and operation of my invention, I will particularly describe its various parts.

A is the cutting apparatus, to the heel B of which is attached a ball, C, by means of a short neck, E, which is rigidly attached to the heel B by some one of the well-known methods. The ball C is made as nearly as possible truly spherical, and is fitted to a correspondinglyshaped socket at the end of the pitman.

As the cutter A moves back and forth in the operation of cutting the grass, the pitman will not only move in the ordinary way, in obedience to the revolution of the crank, but it may at the same time move in a lateral direction, without cramping the joint to accommodate any irregular or lateral movements of the cutting apparatus, which would destroy the parallelism of the line of motion of cutters and pitman. The above-mentioned irregular movements of thecutting apparatus very freqlfntly occur in consequence of loose jointsat the iuner shoe, springing of braces, Snc., and it is of the highest importance to provide against any cramping effect in the pitman-joint, and the ball-and-socket joint is the most perfect and satisfactory in its operation, though more costly than some other forms.

The socket in the end of the pitman is formed in two parts, F and G, the latter being separate from the pitman, and held in position thereon by means of the tightening-bolt H and the iiange I, which is formed across the inner end of G, and is fitted in a groove cut across the face of the pitman, as shown in the drawing; but this would not absolutely prevent the cap G from slipping sidewisein the groove above mentioned. So a short stud, J, is made a part ofthe flange I, and the same is inserted in a recess bored for it in the center of the groove above mentioned.

The tightening-bolt H is provided with a head, of such shape that when iitted to a corresponding seat in the cap G the operation of the tightening-nut K will not cause the bolt H to turn in its seat. This is necessary, not only to insure the proper action of the nut K, but tov prevent the loosening' of the joint by reason of the jarring of the parts during operation; and to preventa like action of the nut, a springpawl, L, is placed beneath the nut K, in a recess made in the bottom face of the said nut for that purpose, and properly secured there.

As the nut is screwed onto the bolt, the free end of the pawl L engages with the teeth of the ratchet M made in the face, against which the nut acts.

These teeth may be formed upon an annular ridge proj ecting into acorresp ondin g groove in the bottom of the nut, or they may be depressed below the surface so as to form an annular toothed groove about the bolt H. These different modes of construction are shown in Figs. 2 and 4 and Figs 10 and l5.

The free end of the pawl L is provided with a stud, N, which projects upward andalongside of the hexagonal portion of a nut.

The stud N is provided with a head at its upper end, and when the nut is t0 be run backward on the screw, the stud N must iirst be drawn upward so as to slip the edge of its head over the edge of the` nut, as shown in Figt, and the paWl will thus be Withdrawn from engagement With the teeth M, and so retained While the nut is being rotated.

It is evident that the saine construction of joint is equally applicable and will be equally useful if applied at the crank-Wrist end of the pitman, and accordingly in Figs. 10 and 11 it is shown as so arranged.

The Wrist-pin E is formed with a flange, beveled at the back, as shown at o, Fig. 9, and this conical part is seated in a corresponding conical seat, so that the tighteningv and holding nut at the end of said pin Will press the conical flange into itsseat, and will thus render any displacement impossible.

By projecting the Wrist-ball C from one side of the knife-heel, the pitman is enabled to act in a line which may represent the line of equilibrium of the cutters-that is, the line on each 3. The Wrist-pin E, constructed with the,f

conical flange O, to lit a corresponding seat, as and for the purpose set forth and described.

SALEM T. LAMB.

Witnesses:

WM. T. STILLWELL, THOMAS COLLIER.

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